US20220362456A1 - Extensible drug injection device and operation method therefor - Google Patents

Extensible drug injection device and operation method therefor Download PDF

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Publication number
US20220362456A1
US20220362456A1 US17/616,711 US202017616711A US2022362456A1 US 20220362456 A1 US20220362456 A1 US 20220362456A1 US 202017616711 A US202017616711 A US 202017616711A US 2022362456 A1 US2022362456 A1 US 2022362456A1
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line
drug
sub
pumping
drug injection
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US17/616,711
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English (en)
Inventor
Hyunjung KOH
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Industry Academic Cooperation Foundation of Catholic University of Korea
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Industry Academic Cooperation Foundation of Catholic University of Korea
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/1407—Infusion of two or more substances
    • A61M5/1408—Infusion of two or more substances in parallel, e.g. manifolds, sequencing valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/1407—Infusion of two or more substances
    • A61M5/1409—Infusion of two or more substances in series, e.g. first substance passing through container holding second substance, e.g. reconstitution systems
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/223—Multiway valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/142—Pressure infusion, e.g. using pumps
    • A61M5/145—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons
    • A61M5/1452—Pressure infusion, e.g. using pumps using pressurised reservoirs, e.g. pressurised by means of pistons pressurised by means of pistons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
    • A61M5/16877—Adjusting flow; Devices for setting a flow rate
    • A61M5/16881—Regulating valves
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M2005/1401—Functional features
    • A61M2005/1406—Minimizing backflow along the delivery catheter track
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/223—Multiway valves
    • A61M2039/224—Multiway valves of the slide-valve type
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/22—Valves or arrangement of valves
    • A61M39/24—Check- or non-return valves
    • A61M2039/2433—Valve comprising a resilient or deformable element, e.g. flap valve, deformable disc
    • A61M2039/2446—Flexible disc
    • A61M2039/246—Flexible disc being fixed along all or a part of its periphery
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7545—General characteristics of the apparatus with filters for solid matter, e.g. microaggregates

Definitions

  • the present invention relates to an extensible drug injection device and an operation method therefor, and more specifically to an extensible drug injection device capable of injecting a drug from a location away from a patient and an operation method therefor.
  • the medical fluid is placed in a bag or bottle containing the medical fluid or drug at a position higher than the patient, and the medical fluid is continuously administered by connecting a medical fluid line to the patient through the medical fluid line.
  • a separate line may be connected to the medical fluid line, or the drug may be administered by an injector.
  • this method needs to be carried out in close proximity to the patient, and there is a need for a method of solving this problem because there are cases where it is difficult to access because there are a lot of equipment or medical devices installed around the patient, and where it may be difficult to inject a drug if access is difficult due to the patient's posture or the risk of infection.
  • the present invention has been devised in view of the above points, and it is an object of the present invention to provide an extensible drug injection device capable of injecting an additional drug from a location away from a patient.
  • a drug injection device including a first sub-line of which one end joins with a main line, connected from a first drug storage part for storing a first drug to be injected into a patient to the body of the patient such that the first drug flows therein, and of which the other end is extended to the other side, a second drug injection part which is connected to the first sub-line and which injects a second drug that is different from the first drug, and a second drug pumping part which is connected to the first sub-line, and which pushes, to the main line, the second drug having been injected by the second drug injection part into the first sub-line.
  • the second drug injection part may include a second drug injector for injecting a second drug and a second sub-line for connecting the second drug injector to the first sub-line.
  • the second drug pumping part may include a pumping solution injector for injecting a pumping solution to push the second drug injected into the first sub-line to the main line, and a third sub-line for connecting the pumping solution injector to the first sub-line.
  • the drug injection device may further include a pumping solution suction line connected to the third sub-line between a point where the third sub-line is joined to the first sub-line and the pumping solution injector, and supplying a pumping solution suctioned by the pumping solution injector.
  • the pumping solution suction line may be in communication with the first drug storage part.
  • One end of the pumping solution suction line connected to the third sub-line may be formed to have a curved end in the third sub-line towards the pumping solution injector.
  • the third sub-line may be joined with the first sub-line at a point where the second drug injection part is connected to the first sub-line or at a rear side thereof.
  • the amount of a pumping solution injected by the pumping solution injector at once may be equal to or more than the internal volume of the first sub-line.
  • the drug injection device may further include a backflow prevention valve provided at one or more points of a point where the first sub-line is connected to the main line, a point where the second drug injection part is connected to the first sub-line, and a point where the second drug pumping part is connected to the first sub-line, and provided such that the flow of the drug or pumping solution flows only towards the main line.
  • a backflow prevention valve provided at one or more points of a point where the first sub-line is connected to the main line, a point where the second drug injection part is connected to the first sub-line, and a point where the second drug pumping part is connected to the first sub-line, and provided such that the flow of the drug or pumping solution flows only towards the main line.
  • the drug injection device may further include a backflow prevention valve provided in the pumping solution suction line such that the flow of the pumping solution flows only towards the main line.
  • the backflow prevention valve may include a rim in close contact with an inner circumferential surface of a tube forming the first sub-line to the third sub-line, one or more membranes formed of a flexible material and curved to form at least a portion of a hemisphere while protruding from the rim to a front side in a flow direction of a fluid, and formed to be closed while overlapping each other when the fluid flows in a direction opposite to a flow and to be opened when the fluid flows in a flow direction, and a fine mesh formed on the rim and provided behind the membrane.
  • the drug injection device may further include a sliding lock valve located in the third sub-line between a point where the third-subline is joined to the first sub-line and a point where the pumping solution suction line is connected, and selectively opening or closing the third sub-line or adjusting the degree of opening.
  • the sliding lock valve may include a valve body formed with a communication hole connected to a tube of the third sub-line and opened to communicate while facing each other, and a sliding slit formed in a direction orthogonal to the communication hole and having one side opened, and a shutter inserted into the slit to be slid to open or close the communication hole or adjust the degree of opening.
  • a protrusion having elasticity may be formed at a predetermined interval in one of the sliding slit or the shutter in contact with the sliding sit, and a groove may be formed at an interval corresponding to an interval of the protrusion in the other one of the sliding slit or the shutter in contact with the sliding slit such that the protrusion and the groove are snapped by elasticity.
  • the shutter may include a slate inserted into the sliding slit to adjust the degree of opening of the communication hole, a handle formed on one side of the slate so as to be exposed from the sliding slit to the outside of the valve body, and a bent part connecting the slate and the handle and provided to be bent on one side.
  • the drug injection device may further include a housing for accommodating the second drug injection part and the second drug pumping part.
  • a method for operating a drug injection device including a first sub-line of which one end joins with a main line, connected from a first drug storage part for storing a first drug to be injected into a patient to the body of the patient such that the first drug flows therein, and of which the other end is extended to the other side, a second drug injection part which is connected to the first sub-line and which injects a second drug that is different from the first drug, and a second drug pumping part which is connected to the first sub-line, and which pushes, to the main line, the second drug having been injected by the second drug injection part into the first sub-line, and the method includes a second drug injection step in which a piston of the second drug injector is advanced, and the second drug is injected into the first sub-line, a pumping solution loading step in which a piston of the pumping solution injector is retracted, and the pumping solution is loaded into the pumping solution injector, and a pumping step in which
  • a third sub-line closing step may be performed in which the gap between the first sub-line and the third sub-line is closed prior to the pumping solution loading step.
  • a third sub-line opening step may be performed in which the gap between the first sub-line and the third sub-line is opened prior to the pumping step.
  • the extensible drug injection device of the present invention and the operation method therefor, it is possible to inject a drug from a location away from a patient, thereby improving the convenience of treatment.
  • fine foreign substances such as glass dust and the like in the drug may be filtered, and bubbles in the drug may be finely decomposed to prevent medical accidents such as occlusion by bubbles and the like.
  • FIGS. 1 to 4 are diagrams illustrating an extensible drug injection device according to an exemplary embodiment of the present invention, which sequentially illustrate a process in which an injection solution and a pumping solution are injected;
  • FIG. 5 is a perspective view illustrating a state in which a second drug injection part and a second drug pumping part of the extensible drug injection device are provided inside a housing;
  • FIG. 6 is a diagram illustrating an extensible drug injection device according to another exemplary embodiment of the present invention.
  • FIG. 7 is an exploded perspective view illustrating a backflow prevention valve provided in the extensible drug injection device according to an exemplary embodiment of the present invention.
  • FIG. 8 is a perspective view illustrating a state in which the backflow prevention valve of FIG. 7 is opened while being coupled;
  • FIG. 9 is a perspective view illustrating a sliding lock valve provided in the extensible drug injection device according to an exemplary embodiment of the present invention.
  • FIG. 10 is a cross-sectional view illustrating a state in which the sliding lock valve of FIG. 9 is closed;
  • FIG. 11 is a cross-sectional view illustrating a state in which the sliding lock valve of FIG. 9 is partially opened.
  • FIG. 12 is a flowchart illustrating a method for operating the extensible drug injection device of the present invention.
  • the extensible drug injection device 100 may include a first sub-line 110 , a second drug injection part 120 and a second drug pumping part 130 , as illustrated in FIGS. 1 to 4 .
  • a medical liquid set In order to continuously administer a medical liquid, a drug or the like to a patient, a medical liquid set may be used.
  • Such a medical liquid set may include a first drug storage part 10 in which a first drug to be administered to a patient is stored, a main line 20 connected to the patient from the first drug storage part 10 and through which the first drug flows, and a catheter (not illustrated) provided at an end of the main line 20 and inserted into the patient.
  • the first drug storage part 10 may be composed of a material such as a bag, a glass bottle or the like made of vinyl or PE, and it may be provided to be mounted at a position higher than the patient to supply a first drug by gravity.
  • one end of the first sub-line 110 may be laminated to a middle of the main line 20 , and the other end of the first sub-line 110 may be made of a flexible soft tube made of silicon or PE extended to the other side.
  • the second drug injection part 120 is connected to the first sub-line 110 , and it is a component for injecting a second drug 30 having a component different from the first drug into the first sub-line 110 .
  • the second drug pumping part 130 is connected to the first sub-line 110 , and it is a component for pushing the second drug 30 injected into the first sub-line 110 by the second drug injection part 120 to the main line 20 .
  • the second drug injection part 120 may include a second drug injector 124 and a second sub-line 122 .
  • the second drug 30 may be contained in the second drug injector 124 .
  • the second drug 30 may be the same component as the first drug or may be a drug having a different component.
  • the second sub-line 122 may be connected from the second drug injector 124 to the first sub-line 110 to be joined to the first sub-line 110 , and may serve as a passage for guiding the second drug 30 of the second drug injector 124 to the first sub-line 110 .
  • the second drug injector 124 may be detachably provided to the second sub-line 122 , and may be provided to fill a drug while being removed from the second sub-line 122 when filling the drug in the second drug injector 124 .
  • the second drug pumping part 130 may include a pumping solution injector 134 and a third sub-line 132 .
  • the pumping solution injector 134 is a component for injecting a pumping solution 40 , which pushes the second drug 30 injected into the first sub-line 110 to the main line 20 , to the first sub-line 110 .
  • the third sub-line 132 may be connected from the pumping solution 40 injector to the first sub-line 110 to serve as a passage for guiding a pumping solution 40 of the pumping solution injector 134 to the first sub-line 110 .
  • the pumping solution 40 may be the same drug as the first drug or the second drug 30 , or may be a drug that is harmless to the human body, such as physiological saline and the like. Alternatively, the pumping solution 40 may be a drug having a different component from the first drug and the second drug 30 .
  • the pumping solution 40 may be injected from the pumping solution injector 134 to the first sub-line 110 through the third sub-line 132 .
  • a pumping solution suction line 136 may be further provided such that the pumping solution 40 may be filled in the pumping solution injector 134 even when the pumping solution injector 134 is not separated from the third sub-line 132 .
  • One end of the pumping solution suction line 136 may be coupled to the third sub-line 132 , and the other end of the pumping solution suction line 136 may extend to the other side so as to be connected to a storage in which the pumping solution 40 is stored.
  • the storage in which the pumping solution 40 is stored may be any storage in which the pumping solution 40 is contained.
  • the pumping solution suction line 136 may be connected to a first drug storage part 10 .
  • the pumping solution suction line 136 may not be connected to the first drug storage part 10 but may be connected to another drug storage part.
  • one end of the pumping solution suction line 136 coupled to the third sub-line 132 may be curved such that the end of the pumping solution suction line 136 faces the pumping solution injector 134 in the third sub-line 132 . This is to allow the pumping solution 40 introduced into the third sub-line 132 through the pumping solution suction line 136 to flow directly towards the pumping solution injector 134 without flowing towards the first sub-line 110 .
  • a point where the third sub-line 132 is joined to the first sub-line 110 may be the same as a point where the second drug injection part 120 is connected to the first sub-line 110 or may be a rear side thereof.
  • a direction of flowing from the second drug injector 124 or the pumping solution injector 134 towards the main line 20 is defined as a front side, and the rear side means to be in the opposite direction of the front side.
  • the pumping solution 40 injected into the first sub-line 110 through the third sub-line 132 may push the second drug 30 injected into the first sub-line 110 through the second sub-line 122 from the rear side to the front side.
  • the amount of the pumping solution 40 injected by the pumping solution injector 134 at once may be equal to or more than the internal volume of the first sub-line 110 . Therefore, even with a single injection of the pumping solution 40 , all of the injected second drug 30 may be pushed up to the main line 20 .
  • the present invention does not particularly limit the lengths of the second sub-line 122 and the third sub-line 132 , and the lengths of the second sub-line 122 and the third sub-line 132 may be increased or decreased as necessary.
  • the second drug injection part 120 and the second drug pumping part 130 may be provided inside a housing 180 .
  • a tube of the first sub-line 110 may be coupled to any one side of the housing 180 .
  • a tube connected to the pumping solution suction line 136 may be coupled to any one side of the housing 180 .
  • the second drug injector 124 and the pumping solution injector 134 may have cylinders located inside the housing 180 , and only pistons may be exposed to the outside of the housing 180 .
  • FIG. 6 is a diagram illustrating another exemplary embodiment of an extensible drug injection device 100 of the present invention.
  • the extensible drug injection device 100 is the same as the extensible drug injection device 100 of the above-described exemplary embodiment, but the third sub-line 132 is not separately provided, and it may be formed in a structure in which the third sub-line 132 is integrally formed with the first sub-line 110 at the end of the first sub-line 110 .
  • the first sub-line 110 is elongated to perform the function of the third sub-line 132
  • the second sub-line 122 is laminated to a middle of the first sub-line 110 .
  • the second drug injector 124 filled with the second drug 30 may enter the first sub-line 110 through the second sub-line 122 .
  • the amount of the second drug 30 may vary depending on the length of the first sub-line 110 , the amount of a drug injected into an injector is generally about several cc, and thus, the injected second drug 30 may not enter the main line 20 and may stay after entering the first sub-line 110 .
  • the piston of the pumping solution injector 134 of the second drug pumping part 130 may be retracted to suction the pumping solution 40 into the pumping solution injector 134 through the pumping solution suction line 136 .
  • the pumping solution 40 in the pumping solution injector 134 may enter the first sub-line 110 through the third sub-line 132 so as to push the second drug 30 remaining in the first sub-line 110 towards the main line 20 .
  • the second drug 30 that has entered the main line 20 may be administered to the body of the patient together with the first drug that has already flown through the main line 20 .
  • a backflow prevention valve 140 may be provided.
  • the backflow prevention valve 140 is a component that allows the second drug 30 and the pumping solution 40 to flow forward only in one direction and prevents the second drug 30 and the pumping solution 40 from flowing in the opposite direction, and may be provided at one or more or all of a point where the first sub-line 110 is connected to the main line 20 , a point where the second drug injection part 120 is connected to the first sub-line 110 , a point where the second drug pumping part 130 is connected to the first sub-line 110 , and the pumping solution suction line 136 .
  • the backflow prevention valve 140 may include a rim 142 closely contacting an inner circumferential surface of a tube forming the first sub-line 110 to the third sub-line 132 , and at least one membrane 144 and a fine mesh 146 formed on the rim 142 .
  • the membrane 144 may be formed of a flexible material, protrude from the rim 142 to the front side in a flow direction of a fluid and be curved to form at least a portion of a hemisphere, and it may overlap and close when the fluid flows in a direction opposite to the flow direction, and open when the fluid flows in a flow direction.
  • the fine mesh 146 may be formed inside the rim 142 , located at a rear side of the membrane 144 , and form a hemisphere similar to the membrane 144 .
  • the membrane 144 when the second drug 30 and the pumping solution 40 flow towards the front side, the membrane 144 may be opened as illustrated in FIG. 8 , and when the second drug 30 and the pumping solution 40 flow in opposite directions, the membrane 144 may be closed to block the flow of the second drug 30 and the pumping solution 40 in the reverse direction as illustrated in FIG. 7 .
  • the fine mesh 146 may support the membrane 144 so as to prevent the membrane 144 from being wetted towards the rear side and being opened.
  • the fine mesh 146 may perform a function of filtering foreign substances included in the second drug 30 , the pumping solution 40 and the like in addition to a function of supporting the membrane 144 .
  • the bubbles may be finely decomposed to prevent occlusion that may occur when the bubbles flow into the blood vessel.
  • a sliding locking valve 150 may be provided.
  • the sliding locking valve 150 is provided in the third sub-line 132 to be a component for selectively opening and closing the third sub-line 132 or adjusting the degree of opening, and it may be provided in the third sub-line 132 between a point where the third sub-line 132 is joined with the first sub-line 110 and a point where the pumping solution suction line 136 is coupled.
  • the sliding locking valve 150 may include a valve body 160 and a shutter 170 .
  • the valve body 160 may be formed with a communication hole 162 to which a tube of the third sub-line 132 is connected and opened to communicate while facing each other, and a sliding slit 164 formed in a direction and a depth orthogonal to the communication hole 162 and having one side opened.
  • the shutter 170 may be formed in a plate shape to be inserted into the sliding slit 164 so as to be slid to open and close the communication hole 162 or adjust the degree of opening.
  • one or a plurality of elastic protrusions 166 may be formed at a predetermined interval in one of the sliding slit 164 or the shutter 170 in contact with the sliding slit 164
  • a groove 176 may be formed at an interval corresponding to an interval of the protrusion 166 in the other one of the sliding slit 164 or the shutter 170 in contact with the sliding slit 164 .
  • the protrusion 166 may be elastically inserted into the groove 176 and snap-fastened to elastically fix a position thereof, and accordingly, as illustrated in FIG. 10 , the communication hole 162 may be maintained in a closed state, or as illustrated in FIG. 11 , the communication hole 162 may be maintained in a partially open state. Certainly, the communication hole 162 may be completely opened as necessary.
  • the shutter 170 may include a slate 172 inserted into the sliding slit 164 to adjust the degree of opening of the communication hole 162 and a handle 174 provided at one side of the slate 172 so as to be exposed from the sliding slit 164 to the outside of the valve body 160 .
  • the protrusion 166 or the groove 176 is formed in the slate 172 , and the slate 172 may open or close the communication hole 162 while sliding inside the sliding slit 164 .
  • the user may adjust the position of the slate 172 by holding and pushing or pulling the handle 174 .
  • the handle 174 protrudes to the outside of the valve body 160 so to be held by the user, and thus, the handle 174 that protrudes to the outside may be caught in another tube or somewhere to interfere with the handle 174 . Therefore, in order to avoid such inconvenience, a bent part 177 may be provided between the handle 174 and the slate 172 .
  • the bent part 177 connects the slate 172 and the handle 174 and is provided to be bendable to one side, and after the operation of adjusting the degree of opening of the shutter 170 is finished, the handle 174 is bent as illustrated in FIG. 11 , thereby minimizing a phenomenon of being caught in somewhere to interfere with the handle 174 , and simultaneously preventing the movement, thereby maintaining the adjustment of the degree of opening of the shutter 170 .
  • the bent part 177 may be formed of a lead and a coating, and the lead may be formed of a metal material having ductility, and one end thereof may extend to the slate 172 , and the other end thereof may extend to the handle 174 .
  • the coating may form an outer shell of the lead such that the lead is not exposed to the outside.
  • the method for operating the extensible drug injection device 100 may include a second drug injection step S 110 , a third sub-line closing step S 120 , a pumping solution loading step S 130 , a third sub-line opening step S 140 and a pumping step S 150 .
  • the second drug injection step S 110 is a step in which the second drug injector 124 filled with the second drug 30 is provided, and then, as illustrated in FIG. 2 , a piston of the second drug injector 124 is advanced such that the second drug 30 is injected into the first sub-line 110 through the second sub-line 122 .
  • the amount of a drug injected into an injector is generally about several cc, and the injected second drug 30 may not enter the main line 20 and may remain after entering the first sub-line 110 .
  • the third sub-line closing step S 120 may be a step in which the third sub-line 132 is closed by closing the communication hole 162 by the shutter 170 of the sliding lock valve 150 .
  • the pumping solution loading step S 130 may be performed after the third sub-line closing step S 120 .
  • the pumping solution loading step S 130 is a step in which a piston of the pumping solution injector 134 of the second drug pumping part 130 is retracted such that the pumping solution 40 is loaded into the pumping solution injector 134 through the pumping solution suction line 136 .
  • the third sub-line 132 is closed through the third sub-line closing step S 120 , and the second drug 30 in the first sub-line 110 and the second sub-line 122 may not flow into the third sub-line 132 by the backflow prevention valve 140 installed in a plurality of places, and the pumping solution 40 may be loaded only through the pumping solution suction line 136 .
  • the third sub-line opening step S 140 may be performed.
  • the third sub-line opening step S 140 may be a step in which the third sub-line 132 is opened by opening the communication hole 162 through the shutter 170 of the sliding lock valve 150 .
  • the pumping step S 150 is a step in which a piston of the pumping solution injector 134 is advanced, and the pumping solution 40 in the pumping solution injector 134 is injected into the first sub-line 110 through the third sub-line 132 , and the second drug 30 remaining in the first sub-line 110 is pushed towards the main line 20 by a pressure thereof.
  • the second drug 30 injected into the main line 20 may be administered to the body of the patient together with the first drug already flowing in the main line 20 .

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Vascular Medicine (AREA)
  • Pulmonology (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)
US17/616,711 2019-06-05 2020-06-04 Extensible drug injection device and operation method therefor Pending US20220362456A1 (en)

Applications Claiming Priority (3)

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KR10-2019-0066817 2019-06-05
KR1020190066817A KR102219766B1 (ko) 2019-06-05 2019-06-05 연장형 약물주입장치 및 그 작동방법
PCT/KR2020/007269 WO2020246821A2 (ko) 2019-06-05 2020-06-04 연장형 약물주입장치 및 그 작동방법

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KR830002822Y1 (ko) * 1982-07-30 1983-12-10 주식회사해성 수액 역류 방지구
JP4338446B2 (ja) * 2003-06-05 2009-10-07 株式会社根本杏林堂 薬液注入装置
JP4044890B2 (ja) * 2003-11-11 2008-02-06 フカイ工業株式会社 医療用スライド式開閉弁
US9028456B2 (en) * 2008-04-30 2015-05-12 Namiki Seimitsu Houseki Kabushiki Kaisha Infusion pump
KR20110001641U (ko) * 2009-08-11 2011-02-17 에이스메디칼 주식회사 삼지 역류방지 튜브
FR2991881B1 (fr) * 2012-06-13 2014-09-05 Medex Sa Dispositif d'injection d'un produit liquide comprenant deux demi-coques mobiles en rotation l'une par rapport a l'autre
JPWO2014104338A1 (ja) * 2012-12-28 2017-01-19 株式会社根本杏林堂 薬液回路およびそれを使用する薬液回路システム
KR101888473B1 (ko) * 2017-08-11 2018-08-16 (주)가이버 여과기능과 역류차단 기능을 갖는 의료용으로 사용되는 수액라인용 필터

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WO2020246821A2 (ko) 2020-12-10
KR102219766B1 (ko) 2021-02-23

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